8 1/2" PDC Drill Bit 4 Baldes Used in Oilfiled Well Drill

China 8 1/2" PDC Drill Bit 4 Baldes Used in Oilfiled Well Drill, Find details about China PDC Drill Bit, PDC Bit from 8 1/2" PDC Drill Bit 4 Baldes Used in Oilfiled Well Drill